Performing a Primary/Standby Switchover

Scenarios

GeminiDB Redis instances provide an automatic HA mechanism. Generally, you do not need to manually perform a primary/standby switchover. You can use this feature to perform DR drills and test client processing capabilities in HA scenarios. You can also perform a primary/standby switchover as needed to meet service requirements.

Prerequisites

Currently, this operation can be performed only on primary/standby GeminiDB Redis instances that are in the Available state.

Precautions

• When you perform a primary/standby switchover, the instance IP addresses remain unchanged, so there is no need to update the service connection address.
• During a primary/standby switchover, the connection is disconnected for less than 10 seconds, which can cause slow latency or command execution failures. To address this issue, you need to have a command retry or connection retry mechanism on the client. Perform primary/standby switchovers during off-peak hours.

Procedure

1. Log in to the GeminiDB console.
2. In the service list, choose Databases > GeminiDB Redis API.
3. On the Instances page, click the target instance.
4. In the Node Information area on the Basic Information page, click Primary/Standby Switchover.
   Figure 1 Performing a primary/standby switchover.
   

5. In the displayed dialog box, click OK.
   Figure 2 Performing a primary/standby switchover.